单项选择题 You have recently completely creating a new application for Certkiller .com. This new application has to load an instance of the Inventory class from a large file named Inventory.dat. You need to ensure that the application executes the loading process in as little time as possible. What should you do?（）

单项选择题 you have recently written the code shown below: Hashtable emailAddresses = new Hashtable (); emailAddresses.Add ("Mia", "mia@ Certkiller .com"); emailAddresses.Add ("Andy", "andy@ Certkiller .com"); emailAddresses.Add ("Kara", "kara@ Certkiller .com"); You need to ensure that these e-mail addresses are stored in the Email.dat file so that you can load them again when the user restarts the application. What should you do?（）

单项选择题 You have recently written the code shown below: Hashtable emailAddresses = new Hashtable (); emailAddresses.Add ("Mia", "mia@ Certkiller .com"); emailAddresses.Add ("Andy", "andy@ Certkiller .com"); emailAddresses.Add ("Kara", "kara@ Certkiller .com"); FileStream stream = new FileStream ("Email.dat", FileMode.Create); BinaryFormatter formatter = new BinaryFormatter (); formatter.Serialize (stream, emailAddresses); You need to ensure that you are able to load the emailAddresses object from the Email.dat file into your application. What should you do?（）